Merge commit 'v2.6.28-rc2' into core/locking

Conflicts:
	arch/um/include/asm/system.h

1 files changed, 38 insertions, 31 deletions

diff --git a/arch/x86/kernel/irqinit_64.c b/arch/x86/kernel/irqinit_64.c
index 1f26fd9ec4f..ff023539128 100644
--- a/arch/x86/kernel/irqinit_64.c
+++ b/arch/x86/kernel/irqinit_64.c
@@ -135,51 +135,33 @@ DEFINE_PER_CPU(vector_irq_t, vector_irq) = {
         [IRQ15_VECTOR + 1 ... NR_VECTORS - 1] = -1
 };
 
-static void __init init_ISA_irqs (void)
+void __init init_ISA_irqs(void)
 {
         int i;
 
         init_bsp_APIC();
         init_8259A(0);
 
-        for (i = 0; i < NR_IRQS; i++) {
-                irq_desc[i].status = IRQ_DISABLED;
-                irq_desc[i].action = NULL;
-                irq_desc[i].depth = 1;
+        for (i = 0; i < 16; i++) {
+                /* first time call this irq_desc */
+                struct irq_desc *desc = irq_to_desc(i);
 
-                if (i < 16) {
-                        /*
-                         * 16 old-style INTA-cycle interrupts:
-                         */
-                        set_irq_chip_and_handler_name(i, &i8259A_chip,
+                desc->status = IRQ_DISABLED;
+                desc->action = NULL;
+                desc->depth = 1;
+
+                /*
+                 * 16 old-style INTA-cycle interrupts:
+                 */
+                set_irq_chip_and_handler_name(i, &i8259A_chip,
                                                       handle_level_irq, "XT");
-                } else {
-                        /*
-                         * 'high' PCI IRQs filled in on demand
-                         */
-                        irq_desc[i].chip = &no_irq_chip;
-                }
         }
 }
 
 void init_IRQ(void) __attribute__((weak, alias("native_init_IRQ")));
 
-void __init native_init_IRQ(void)
+static void __init smp_intr_init(void)
 {
-        int i;
-
-        init_ISA_irqs();
-        /*
-         * Cover the whole vector space, no vector can escape
-         * us. (some of these will be overridden and become
-         * 'special' SMP interrupts)
-         */
-        for (i = 0; i < (NR_VECTORS - FIRST_EXTERNAL_VECTOR); i++) {
-                int vector = FIRST_EXTERNAL_VECTOR + i;
-                if (vector != IA32_SYSCALL_VECTOR)
-                        set_intr_gate(vector, interrupt[i]);
-        }
-
 #ifdef CONFIG_SMP
         /*
          * The reschedule interrupt is a CPU-to-CPU reschedule-helper
@@ -207,6 +189,12 @@ void __init native_init_IRQ(void)
         /* Low priority IPI to cleanup after moving an irq */
         set_intr_gate(IRQ_MOVE_CLEANUP_VECTOR, irq_move_cleanup_interrupt);
 #endif
+}
+
+static void __init apic_intr_init(void)
+{
+        smp_intr_init();
+
         alloc_intr_gate(THERMAL_APIC_VECTOR, thermal_interrupt);
         alloc_intr_gate(THRESHOLD_APIC_VECTOR, threshold_interrupt);
 
@@ -216,6 +204,25 @@ void __init native_init_IRQ(void)
         /* IPI vectors for APIC spurious and error interrupts */
         alloc_intr_gate(SPURIOUS_APIC_VECTOR, spurious_interrupt);
         alloc_intr_gate(ERROR_APIC_VECTOR, error_interrupt);
+}
+
+void __init native_init_IRQ(void)
+{
+        int i;
+
+        init_ISA_irqs();
+        /*
+         * Cover the whole vector space, no vector can escape
+         * us. (some of these will be overridden and become
+         * 'special' SMP interrupts)
+         */
+        for (i = 0; i < (NR_VECTORS - FIRST_EXTERNAL_VECTOR); i++) {
+                int vector = FIRST_EXTERNAL_VECTOR + i;
+                if (vector != IA32_SYSCALL_VECTOR)
+                        set_intr_gate(vector, interrupt[i]);
+        }
+
+        apic_intr_init();
 
         if (!acpi_ioapic)
                 setup_irq(2, &irq2);